| Years | Country | % Correct |
|---|---|---|
| 1822 - | Brazil | 94%
|
| 1960 - | D.R. Congo | 88%
|
| 1830 - | Ecuador | 87%
|
| 1890 - 1963 | United Kingdom | 85%
|
| 1882 - 1960 | France | 83%
|
| 1885 - 1908 | Congo Free State | 82%
|
| 1960 - | Rep. of the Congo | 82%
|
| 1949 - | Indonesia | 76%
|
| 1963 - | Kenya | 74%
|
| 1819 - | Colombia | 73%
|
| 1816 - 1942, 1945 - 1949 | Netherlands | 62%
|
| 1960 - | Gabon | 61%
|
| 1493 - 1975 | Portugal | 61%
|
| 1962 - | Uganda | 59%
|
| 1908 - 1960 | Belgium | 56%
|
| 1925 - 1941, 1950 - 1960 | Italy | 51%
|
| 1960 - | Somalia | 51%
|
| 1911 - 1916 | Germany | 48%
|
| 1942 - 1945 | Japan | 40%
|
| 1975 - | São Tomé and Príncipe | 38%
|